CD54HC670, CD74HC670, CD74HCT670
Prerequisite for Switching Specifications
25
o
C
PARAMETER
HC TYPES
Setup Time
Data to WE
Write to WE
t
SU
, t
h
2
4.5
6
Hold Time
Data to WE
Write to WE
t
H
, t
W
2
4.5
6
Pulse Width WE
t
W
2
4.5
6
Latch Time WE to RA0,
RA1
t
LATCH
2
4.5
6
HCT TYPES
Setup Time
Data to WE
Hold Time
Data to WE
Write to WE
Setup Time
Write to WE
Pulse Width WE
Latch Time WE to RA0,
RA1
t
SU
, t
h
t
H
, t
W
4.5
12
-
-
15
-
-
18
-
-
ns
60
12
10
5
5
5
80
16
14
100
20
17
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
75
15
13
5
5
5
100
20
17
125
25
21
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
90
18
15
5
5
5
120
24
20
150
30
26
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
SYMBOL
V
CC
(V)
MIN
TYP
MAX
-40
o
C TO 85
o
C
MIN
TYP
MAX
-55
o
C TO 125
o
C
MIN
TYP
MAX
UNITS
4.5
5
-
-
5
-
-
5
-
-
ns
t
SU
t
W
t
LATCH
4.5
18
-
-
23
-
-
27
-
-
ns
4.5
4.5
20
25
-
-
-
-
25
31
-
-
-
-
30
38
-
-
-
-
ns
ns
Switching Specifications
C
L
= 50pF, Input t
r
, t
f
= 6ns
25
o
C
V
CC
(V)
MIN
TYP
MAX
-40
o
C TO
85
o
C
MIN
MAX
-55
o
C TO
125
o
C
MIN
MAX
UNITS
PARAMETER
HC TYPES
Propagation Delay
Reading Any Word
SYMBOL
TEST
CONDITIONS
t
PLH
, t
PHL
C
L
= 50pF
2
4.5
C
L
= 15pF
C
L
= 50pF
5
6
2
4.5
C
L
= 15pF
C
L
= 50pF
5
6
-
-
-
-
-
-
-
-
-
-
16
-
-
-
21
-
195
39
-
33
250
50
-
43
-
-
-
-
-
-
-
-
245
49
-
42
315
63
-
54
-
-
-
-
-
-
-
-
295
59
-
50
375
75
-
64
ns
ns
ns
ns
ns
ns
ns
ns
Write Enable to Output
t
PLH
, t
PHL
C
L
= 50pF
5
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
